How to Fix Facebook Graph API 2.3 Issues with Access Tokens and Missing User Data?

Facebook Graph API 2.3 Issues Resolving

The Graph API 2.3 upgrade has brought forth some unexpected issues. Unable to retrieve API responses and missing user data are among the most prevalent. However, the fix for these problems lies in understanding the changes introduced in version 2.3.

Response Format Change

Version 2.3 has altered the response format for the "oauth/access_token" endpoint. It now returns valid JSON instead of URL-encoded data. This change affects the access token parsing mechanism in the Facebook SDK 3.2.2.

Solution

To rectify this, you must modify the "getAccessTokenFromCode" function within the SDK to parse the response as JSON. The updated code below demonstrates this fix:

  $response = json_decode($access_token_response);
  if (!isset($response->access_token)) {
    return false;
  }
  return $response->access_token;

Additional Changes

• setExtendedAccessToken() Modification: The "setExtendedAccessToken()" function also requires a similar update. The modified code below resolves the issue with extending access tokens.

  public function setExtendedAccessToken() {
    try {
      // Get extended access token.
      $access_token_response = $this->_oauthRequest(
        $this->getUrl('graph', '/oauth/access_token'),
        $params = array(
          'client_id' => $this->getAppId(),
          'client_secret' => $this->getAppSecret(),
          'grant_type' => 'fb_exchange_token',
          'fb_exchange_token' => $this->getAccessToken(),
        )
      );
    }
    catch (FacebookApiException $e) {
      // User revoked authorization.
      return false;
    }

    if (empty($access_token_response)) {
      return false;
    }

    $response = json_decode($access_token_response);
    if (!isset($response->access_token)) {
      return false;
    }

    $this->destroySession();

    $this->setPersistentData(
      'access_token', $response->access_token
    );
  }

• Missing Birthday Data: Retrieving a user's birthday requires additional permissions and a specific field request. Ensure you have the necessary permissions and are explicit in your field request.

By implementing these updates and modifications, you can resolve the issues faced with the Facebook Graph API 2.3.

The above is the detailed content of How to Fix Facebook Graph API 2.3 Issues with Access Tokens and Missing User Data?. For more information, please follow other related articles on the PHP Chinese website!